Haeeis taboe



(No Model.)

H. TABOR.

STEAM ENGINE GOVERNOR.

No. 303,895. Patented Aug. 19, 1884..

FIGJ'.

ATTORNEY.

Uivirnn c STATES PATIENT Orricn.

HARRIS TABOR, OF ALLEGHENY, IENNSYLVANIA, ASSIGNOR OF ONE-HALF TO DANIEL A. \VIGrHIliIAN, OF SAME PLACE.

STEAM-ENGINE GOVERNOR.

SPECIFICATION forming part of Letters Patent No. 303,895, dated August 19, 1884.

Application filed April 21, 1894. (No model.)

To (11 whom it may concern:

Be it known that I, HARRIS TABOR, of the city and county of Allegheny, in the State of Pennsylvania, have invented certain new and useful Improvements in SteanrEngine G'overnors, of which improvements the following is a specification.

My invention relates to centrifugal govern ors of the class to which. regulation is effected 1 by varying the throw of a valve-operating eccentric, and consequcntl y the travel of the valve operated thereby, by the movements of weights or pend ulums under the influence of varying degrees of induced centrifugal force; and its object is to provide in a governor of such character simple and etficient means for effecting the movement of the valve eccentric transversely to the axis of the shaft with which it is connected.

The improvements claimed are hereinafter fully set forth.

In the accompanying drawings, Figure 1 is aview in elevation of a governor embodying my invention, and Fig. 2 a transverse section through the same at the line :0 m of Fig. 1.

In the practice of my invention I employ as the support of the operative mechanism a wheel, disk, or case, 1, whichiskeyed or otherwise firmly secured to the main crank-shaft2 of 0 the engine, or to acounter-shaft driven therefrom. The eccentric 3,which actuates the main or distribution valve of the engine, is fitted freely around the shaft 1,s0 as to have the capacity of movement transversely thereto, and may be 5 either in the form of an annulus, as shown, or be slotted transversely to admit of the range of movement required. Two rings or sockets, 4, are formed upon or secured to the eccentric 3 on diamctrically-opposite sides of its center, said rings forming the straps or bearings of eccentrics or crank-pins 5, each of which is secured upon one end of a shaft, 6, or on an arm thereon, said shafts being mounted in bearings 7 on the governor-ease 1, and adapted 5 to move axiallytherein parallel with the shaft 1. Each of the shafts 6 has secured upon its opposite end an arm, 8, which'is coupled by a link, 9, to a weight'arm,10,journaled at one end by a stud or pivot, 1l,'to a bearing, 12, on the case 1, and carrying at or near its free end a weight or pendulum, l3. Springs 14, acting in opposition to the centrifugal force of the weights 18, are coupled atone end to hooks or clevises 15 on the weight-arms 10, and secured at their opposite ends to seats or pro 5 jections 16 on the case 1. In operation, outward movements of the weight-arms 10, induced by the action of cen trifugal force upon their weights 13, will,

through the links 9, arms 8, and shafts 6, 1'0- 6 tate the eccentrics or crank-pins 5 in the direction of the short arrows and move the valve eccentric 3 rectilineally and transversely t0 the shaft 1 from the position in which it is shown, being that of greatest eccentricity, 6

toward the left of Fi 1, thereby reducing its radius of eccentricity, and consequently the traverse of the valve which it operates, proportionately to the degree of movement of the weights, and the inward movement of the weight-arms under the centripetal action of the springs 14 will correspondingly move the valve-eccentric in the opposite direction. The mechanism of the governor is simple, compact, and inexpensive, and in application to retat-ivc engines of any of the known con.- structions.- to which it is readily adaptable, presents the advantages of sensitiveness in the adjustment of the eccentric, and steadiness of the latter in its different adjusted positions 3 corresponding with the grades of expansion required to maintain uniform speed of the en gine under variations of pressure and load.

I claim as my invention and desire to secure by Letters Pateut- 1. In a centrifugal governor, the combination of a valve-eccentric having an opening or transverse slot adapted to fit frecl y over a crank-shaft, a pair of rings or sockets connected to said eccentric on opposite sides of 0 its center, respectively, and eccentrics fitting in said rings, substantially as set forth. Y

2. In a centrifugal governor, the combina tion of a supporting disk or case, a valve-eeeentric having an opening or transverse slot @5 adapted to fit freely over a crank-shaft, a pair of rings or sockets connected to said valveeecentric on opposite sides of its center, respectively, eccentrics or crank-pins fitting in said rings, and mechanism for rotating said loo eccentrics within their rings by the movement of weighted arms pivoted to the governor case, substantially as set forth.

3. In a centrifugal governor, the combination of a supporting disk or case, a valve-eccentric which is open or slotted to embrace a crank-s11aft,with the capacity of movement transversely thereto, two rings or sockets connected to said valve-eccentric on opposite sides of its center, respectively, eccentrics fitting said rings and secured upon shafts mounted on-bearings in the governor-ease,

links connecting 3111181011 said shafts with arms pivoted at one end to the governorcase, and carrying weights or pendulums on their opposite ends, and springs coupled at one end to the governor-case and at the other to the weight-arms, substantially as set forth.

HARRIS TABOR.

\Vitnesses:

J. SNOWDEN BELL,

1%, H. WHITTLEsEY. 

